diff --git a/appveyor.yml b/appveyor.yml
index 95275af..30edf42 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -17,7 +17,7 @@ before_build:
   - cd c:\projects\libwebrtc
   - if "%platform%"=="x86" set CMAKE_GENERATOR_NAME=Visual Studio 14 2015
   - if "%platform%"=="x64" set CMAKE_GENERATOR_NAME=Visual Studio 14 2015 Win64
-  - cmake -G "%CMAKE_GENERATOR_NAME%" -DBUILD_SAMPLE=1 -DCMAKE_BUILD_TYPE=%configuration% -DCMAKE_INSTALL_PREFIX=c:\projects\libwebrtc .
+  - cmake -G "%CMAKE_GENERATOR_NAME%" -DBUILD_SAMPLE=1 -DCMAKE_BUILD_TYPE=%configuration% -DBUILD_TESTS=ON -DCMAKE_INSTALL_PREFIX=c:\projects\libwebrtc .
 
 build:
   project: PACKAGE.vcxproj